# This code has been significantly modified from the original source, which
# is distributed with Nokia's Python for Series 60, by Christopher Schmidt,
# and is released under the same license as that code (see below).
# 
# Copyright (c) 2008 Christopher Schmidt
# Copyright (c) 2005 Nokia Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import appuifw
from graphics import *
import e32

import sensor
class SensorConnection(object):
    delta = []
    def __init__(self):
        """Connect to the sensor."""
        sens = sensor.sensors()['AccSensor']
        self.s = sensor.Sensor(sens['id'], sens['category'])
        self.s.connect(self.callme)
    
    def callme(self, state):
        self.delta = []
        for key in ['data_1', 'data_2', 'data_3']:
            val = state[key]
            self.delta.append(int(val + 40)/80)

    def cleanup(self):
        """Cleanup after yourself. *Must be called* before exiting."""
        self.s.disconnect()

sense_conn = SensorConnection()

appuifw.app.screen='full'
img=None
def handle_redraw(rect):
    if img:
        canvas.blit(img)
appuifw.app.body=canvas=appuifw.Canvas(
    redraw_callback=handle_redraw)
img=Image.new(canvas.size)

running=1
def quit():
    global running
    running=0

appuifw.app.exit_key_handler=quit

location=[img.size[0]/2,img.size[1]/2]
speed=[0.,0.]
blobsize=16
xs,ys=img.size[0]-blobsize,img.size[1]-blobsize
acceleration=0.05
friction = 0.993

import time
start_time=time.clock()
n_frames=0

# To speed things up, we prerender the text.
labeltext=u'Tilt the phone to move'
textrect=img.measure_text(labeltext, font='normal')[0]
text_img=Image.new((textrect[2]-textrect[0],textrect[3]-textrect[1]))
text_img.clear(0)
text_img.text((-textrect[0],-textrect[1]),labeltext,fill=0xffffff,font='normal')

while running:
    img.clear(0)
    img.blit(text_img, (0,0))
    img.point((location[0]+blobsize/2,location[1]+blobsize/2),
              0x00ff00,width=blobsize)
    handle_redraw(())
    e32.ao_yield()
    e32.reset_inactivity()
    speed[0]*=friction
    speed[1]*=friction
    location[0]+=speed[0]
    location[1]+=speed[1]
    
    n_frames+=1
    
    if not sense_conn: continue

    if not len(sense_conn.delta): continue    
    
    x_bounce_factor = .8 * (1 - min(6,abs(sense_conn.delta[0])) / 9) 
    y_bounce_factor = .8 * (1 - min(6,abs(sense_conn.delta[1])) / 9) 

    if location[0]>xs:
        location[0]=xs-(location[0]-xs)
        speed[0]= -x_bounce_factor * speed[0]
        speed[1]=0.90*speed[1]
    if location[0]<0:
        location[0]=-location[0]
        speed[0]= -x_bounce_factor * speed[0]
        speed[1]=0.90*speed[1]
    if location[1]>ys:
        location[1]=ys-(location[1]-ys)
        speed[0]=0.90*speed[0]
        speed[1]= -y_bounce_factor * speed[1]
    if location[1]<0:
        location[1]=-location[1]
        speed[0]=0.90*speed[0]
        speed[1]= -y_bounce_factor * speed[1]
    
    speed[0] -= (sense_conn.delta[1]) * acceleration
    speed[1] -= (sense_conn.delta[0]) * acceleration

    speed[0] = max(min(xs / 2, speed[0]), -xs/2) 
    speed[1] = max(min(ys / 2, speed[1]), -ys/2) 
    
end_time=time.clock()
total=end_time-start_time

sense_conn.cleanup()

print "%d frames, %f seconds, %f FPS, %f ms/frame."%(n_frames,total,
                                                     n_frames/total,
                                                     total/n_frames*1000.)